Many un-resolved domains
Mark Andrews
Mark_Andrews at isc.org
Tue Nov 28 00:06:50 UTC 2006
> Dears,
>
> I have many domains not resolved by my DNS servers. I tested using other DNS
> like ns1.ns.com and dnsreport.com all fine. I have many like:-
> almanea.net
> djh6.com
> q6ooof.com
> x-treme1.net
> ma6r.net
>
> By dumping my cache I found all of their DNS is "ns.xxx.y \-ANY
> ;-$NXDOMAIN"
>
> Where is the problem?
Broken delegations. Take the example below. There are
only glue records for the nameservers and not the actual
records themselves.
What is past to the parent is supposed to be a *copy* of
what is in the child zone. The applies equally to NS, A
and AAAA records. Zone administators fail to do this.
Note most of these error could be caught at registration
time except people seem to want "fast" over "correct".
> Do I have to modify my DNS server timeout?
No.
> Rid
>
>
x-treme1.net. 172800 IN NS ns1.sitearab.com.
x-treme1.net. 172800 IN NS ns2.sitearab.com.
;; Received 110 bytes from 192.31.80.30#53(D.GTLD-SERVERS.net) in 170 ms
ns2.sitearab.com. 172800 IN A 216.66.21.12
sitearab.com. 172800 IN NS ns1.sitearab.com.
sitearab.com. 172800 IN NS ns2.sitearab.com.
;; Received 114 bytes from 192.31.80.30#53(D.GTLD-SERVERS.NET) in 174 ms
drugs:dnssec 10:56 {293} % dig ns2.sitearab.com @216.66.21.12
; <<>> DiG 9.3.2-P2 <<>> ns2.sitearab.com @216.66.21.12
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 54062
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;ns2.sitearab.com. IN A
;; AUTHORITY SECTION:
sitearab.com. 14400 IN SOA ns1.sitearab.com. matt.netsender.co.uk. 2005022501 14400 7200 3600000 86400
;; Query time: 253 msec
;; SERVER: 216.66.21.12#53(216.66.21.12)
;; WHEN: Tue Nov 28 10:56:10 2006
;; MSG SIZE rcvd: 94
drugs:dnssec 10:56 {294} %
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews at isc.org
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